olive parlatoria scale
orange scale (Lepidosaphes beckii)
orange snow scale
orchid parlatoria scale
oriental scale
oriental yellow scale
oystershell scale (Lepidosaphes ulmi)
obscure scale
oleander scale (Aspidiotus nerii)
olive scale
orange brown scale
orange chionaspis
orange scale (Aonidiella aurantii)
orchid scale
oriental citrus scale
oriental red scale
oystershell scale (Diaspidiotus ostreaeformis)